Attaching knobs to their shanks



(No Model.)

S. P. COOLEY. ,ATTAGHING KNOBS T0 THEIR SHANKS.

No. 439,120. Patented Oct. 28, 1890.

fue mams varias co., Pnmumu, asuma-mu, n. c.

UNITED STATES PATENi OFFICE.

SHERMAN P. COOLEY, OF NEW BRITAIN, CONNECTICUT.

ATTACHING KNOBS TO THEIR SHANKS.

SPECIFICATION forming part of Letters Patent No. 439,120, dated October 28, 1890.

Application tiled September 9, 1890. Serial No. 364,403. (No model.)

T0 all whom it may concern.'

Be it known that I, SHERMAN P. OooLnY, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Attaching Knobs to their Shanks, of which the following is a speciiication.

My invention relates to improvements in attaching knobs to their shanks, and the chief obJect of my improvement is to produce a more substantial article.

In the accompanying drawings,Figure lis a central longitudinal section of a knob-shank and knob. Fig. 2 is a longitudinal section of the knob-shank on a pla-ne at right angles to that shown in Fig. l. Fig. 3 is a side elevation of said knob-shank with a corner elevation otl the attached butt. Fig. 4. is a detached side elevation ot the wrought butt for my knob-shank. Fig. 5 is a side elevation ot' another ordinary form of knob-shank with a corner elevation of my butt attached thereto; and Fig. 6 is a perspective view of a butt for my knob-shank, provided with notched or serrated edges.

A designates a knob-shank of ordinary form and havingthe ordinary squared socket 7 for the knob-spindle, and B is the knob secured thereto by means of a wrought-metal butt S and surrounding soft metal 9. Ordinarily knobs are attached to their Shanks by inserting their butts in a hole in the knob and iilling the hole with soft metal; but ordidinarily the butt inserted in said hole has been formed of cast metal integral with the knob-shank.

Instead of the ordinary cast-metal butt I employ a wroughtfmetal butt 8, the same being formed principally of two legs aixed to the body of the shank during the casting process and forming a continuation of the sides of the socket 7 for the knob-spindle. I prefer to form this shank of a single piece of sheet metal bent into loop form, as shown, and to provide its inner end with enlarge ments or projections l0 forbeing inclosed by the metal forming the shank, as indicated by the broken lines in Fig. l.

be formed of either lattened or round wire bent into loop form, and it is obvious that It may, however,v

the projections or enlargements at the inner end for being embedded in the cast-metal shank may be of various forms. If desired, when formed 0f sheet metal the projecting portion of the butt may be notched or recessed on its edges, as shown at 1l, Fig. 6, and, if desired, the connection between the two legs at the outer end of the buttS may be omitted.

A Wrought-metal butt formed as described may be attached to a sand core for forming the spindle-socket 7 in the knob-shank and with the core set Within the core-print in the ordinary manner of casting, so that when the knobshank A is cast it will inclose the end of said butt, as shown, and firmly secure it to the knob-shank. Tumbling in a rolling barrel will remove the sand core and leave the knob-shank and attachedbuttin the form represented in Figs. 2, 3, and arf/This shank is placed on the knob B, with the wroughtmetal butt in a hole in said knob and the remaining space filled with lead orsoft metal 9, as shown in Fig. l.

By making the butt 8 ot' Wrought metal, with its legs forming a continuation ot the sides of the hole through the shank, I- am enabled to employ a sand core in casting the shank, and thereby produce the knob-shank and butt at a nominal price. The butt, although small, is of superior strength and not likely to bei broken oi or become detached. It is smaller than the ordinary cast-metal butt, so that the hole in the knobmay be smaller, thereby greatly increasing the strength and durability of the knob.

I claim as my inventionl. The herein-described knob and shank attach ment, consisting of the cast-metal knobshank and the wrought-metal butt secured thereto for attaching to the knob with soft metal, substantially as described,and for the purpose specified.

2. In aknob attachment, a cast-metal knobshank and a separately-formed butt having two legs which form a continuation of two sides of the spindle-socket, substantially as described, and for the purpose specified.

SHERMAN P. COOLEY.

VVitnesses.

W. E. PARKER, J. E. HANCE. 

